For a little bit extra you could go for Audio-Technica ATH-M50 - I think I paid £125 offav Ebay - very pleased with mine.
I like also 280 for tracking, but trying to figure out whats going on with the sound is pretty useless - in my opinion they are a bit boomy and scooped. Well maybe I'm just used to with 7506I use Sennheiser HD280 for tracking, because the attenuation is really good (damned little bleed)... ...but they are more comfortable if you have to wear them for 4 hours.
AKG K-271 MKII Studio - stereo closed back dynamic headphones, circumaural design, 55ohms rated impedance, 200mW maximum input power, frequency range: 16Hz-28kHz, 104dB/V sensitivity, self-adjusting headband and auto-shut-off feature, single side jack, Includes 3mtr cable with 3.5mm stereo mini-jack plug, 5mtr coiled cable with 3.5mm stereo mini-jack plug, 1 pair of velvet pads and gold plated 1/8" to 1/4" screw-on adapter, Weight: 240g (without cable)
You know what- they don't sound as good as my existing AKG K 44s ( £25.00 ) Good- but not as good.
Well, I'm using them for listening to John McGlaughlin at present ( Industrial Zen ) The cheaper 'phones send a shiver up my neck when the acoustic bass player leaves his body ( short circuit somewhere ? ) The pricey AKGs iron it all a tad flat. No real worries though. I'll just use the cheopos for transcendental purposes and mix with the others.
It's handy having a four channel ' phone amp. though. I can flip between each.
I like also 280 for tracking, but trying to figure out whats going on with the sound is pretty useless - in my opinion they are a bit boomy and scooped. Well maybe I'm just used to with 7506